Don't be a lazy moron when reloading

N560 in a .280. Yes it will fit. Just a total blonde airhead moment. Only fired one. But a 162 grain eldx should NOT hit 3250 leaving a 22” barrel .280 Remington. Had to pound the bolt open. Thankfully the rifle was fine and I walked away with fingers and a face, as ugly as it is. Fired a hundred or so rounds since with no issues. Took them home and disassembled to see what the deal was. They were ALL precisely 10 grains over. Nice reminder to do a cranial rectal extraction when switching cartridges.
What is your calculated case fill with that combo? It has to be very low, in which case I personally would move to a slower burning powder to get near 100% case fill.
 
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